Show simple item record

dc.contributor.authorAebersold, A. B.
dc.contributor.authorFanni, L.
dc.contributor.authorHessler-Wyser, A.
dc.contributor.authorNicolay, S.
dc.contributor.authorBallif, C.
dc.contributor.authorHebert, C.
dc.contributor.authoret al.
dc.date.accessioned2021-12-09T13:27:10Z
dc.date.available2021-12-09T13:27:10Z
dc.date.issued2017
dc.identifier.citationActa Materialia, vol. 130, pp. 240-248, May 2017.
dc.identifier.urihttps://yoda.csem.ch/handle/20.500.12839/171
dc.description.abstractZnO is commonly observed and assumed to crystallize fully in a wurtzite structure. Indeed, While polytypism between a wurtzite and a zinc blende phase is often seen in some II-VI compounds, it has only rarely been observed in ZnO. Here, by means of automated crystal orientation mapping and high resolution imaging in transmission electron microscopy, we identify nanometer-sized regions of zinc blende forming during the growth of compact nanocrystalline metal organic chemical vapor deposited ZnO films. We analyze a c-fiber-textured wurtzite ZnO film, where the columnar grain growth, typical for polycrystalline films, is interrupted by the formation of these zinc blende regions. These regions in turn provide surfaces for the heteroepitaxial renucleation of newly oriented wurtzite grains. In contrast to the columnar grains, which grow fastest along their c-axis, these new grains are identified to grow fastest along their basal plane. By means of convergent beam electron diffraction, we show that this difference in fast growth direction relates to the polarity of exposed facets. A growth model is proposed, showing how this polytypism affects the microstructure evolution of the film in ways that were not predicted by existing film growth models. (C) 2017 Acta Materialia Inc. Published by Elsevier Ltd. All rights reserved.
dc.subjectTransmission electron microscopy (TEM), Automated crystal orientation, mapping (ACOM), Zinc oxide (ZnO), Zinc blende, beam electron-diffraction, thin-films, polarity determination, growth, orientation, zincblende, tem, texture, nanowires, evolution, Materials Science, Metallurgy and Metallurgical Engineering
dc.titleZinc blende-wurtzite polytypism in nanocrystalline ZnO films
dc.typeJournal Article
dc.type.csemdivisionsDiv-V
dc.type.csemresearchareasOther
dc.identifier.doihttps://doi.org/10.1016/j.actamat.2017.03.021


Files in this item

FilesSizeFormatView

There are no files associated with this item.

This item appears in the following Collection(s)

  • Research Publications
    The “Research Publications” collection provides bibliographic information for scientific papers including conference proceedings and presentations.

Show simple item record